How do I install a flange?

Take the flange and gasket tape with screws included out of the package, fasten the foam gasket to the underside of the flange by exposing the sticky side of the foam tape and attaching it around the circumference of the bottom of the flange. Once the gasket tape is installed, center the flange on the top of the filter and use the 6 tek screws to fasten the flange to the top of the filter. Be sure not to torque the screws too much as you could strip the steel or warp the flange and create air gaps. You can purchase a flange separate from your filter and fan or have it come with everything in a Box Combo.